# Geometric Sequence vs Dotty

The clearest difference is in-app purchases: Geometric Sequence at none against Dotty's 1. Geometric Sequence also leads on iOS requirement (12.0 vs 16.6). On price, ads and device support there is nothing between them.

Both are free to download. Dotty sells 1 one-off in-app purchase. Geometric Sequence asks for nothing beyond the download.

## The numbers

| Metric | Geometric Sequence | Dotty |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 3 weeks |
| Size | 20 MB | 29 MB |
| Requires iOS | **12.0** | 16.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Science Education Institute](https://appshunter.io/developer/1439710468) | [Devinet](https://appshunter.io/developer/737922637) |

## What reviewers say

### Geometric Sequence

[App page](https://appshunter.io/ios/app/geometric-sequence/id6504672258)

**Features:** macOS Compatibility

**In-app purchases:** none


### Dotty

[App page](https://appshunter.io/ios/app/dotty-reading-and-writing/id6748616008)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Magic Pencil | $5.99 | one-time |


## Frequently asked questions

### Is Geometric Sequence free?

Geometric Sequence is free to download, with no in-app purchases.

### Is Dotty free?

Dotty is free to download, with in-app purchases available.

### Do Geometric Sequence or Dotty have ads?

Neither Geometric Sequence nor Dotty shows ads.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*